Fir Audio KR5 for sale or trade. Would prefer trade. This is the best IEM I have owned. The bass is amazing with an astonishing high end. Unfortunately the design that results in such wonderful sound does not fit my type of use. I need a more isolating design than the Kinetic Bass design allows. The IEM comes with all accessories plus numerous unused tips I bought to try. It includes all stock atom modules and the optional Red module. I am the second owner. Because I have a very nice aftermarket cable all trades will required to be terminate in 2 pin. Trades only in US. Outright purchase can be shipped elsewhere at buyers expense.